Question

Find the value of x in each case ​

Answer 1

Answer:

x = 12

Step-by-step explanation:

In ΔABC, Exterior ∠DBC = Sum of the non-adjacent interior angles

= ∠BAC + ∠BCA

According to the problem:

(10x - 16) = (3x+20) + 4x

=> 10x - 3x - 4x = 20 + 16  [organising like terms together]

=>3x = 36

∴ x = 12

Answer 2

Answer:-

8.470

step by step explanation :-

As we know that ,

Sum of all angles of triangle = 180°

so, A + B+C =180

NOW,

(3X+20)°+(10X-16)°+4X =180

3X + 20 + 10X + 16+4X=180

17X + 36 =180

17X = 180 - 36

X= 144/17

X= 8.470

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